238 lines
10 KiB
C++
238 lines
10 KiB
C++
#include "harness.hpp"
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#include <plot/input/controller.hpp>
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#include <plot/plot/plot.hpp>
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#include <plot/data/array_series.hpp>
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#include <cmath>
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#include <utility>
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#include <vector>
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namespace {
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using plot::f32;
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using plot::f64;
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using plot::u32;
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constexpr u32 kShift = static_cast<u32>(plot::input::Mod::Shift);
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constexpr u32 kCtrl = static_cast<u32>(plot::input::Mod::Ctrl);
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constexpr u32 kNoAxis = ~u32{0};
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/// A 800x400 plot with one x axis spanning [0, 100] and the controller attached.
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struct Fixture {
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plot::Plot plot;
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u32 ax = kNoAxis;
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u32 ay = kNoAxis;
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plot::input::Controller controller{plot};
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Fixture() {
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plot.set_viewport({0.0f, 0.0f, 800.0f, 400.0f});
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ax = plot.add_x_axis({"t", {0.0, 100.0}, false, plot::AxisPlace::Bottom, false});
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controller.set_viewport({0.0f, 0.0f, 800.0f, 400.0f});
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}
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};
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f32 screen_x_of(const plot::Plot& p, u32 axis, f64 data) {
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return static_cast<f32>(p.x_transform(axis).to_screen_x(data));
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}
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} // namespace
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PLOT_TEST(wheel_zoom_keeps_data_under_cursor_fixed) {
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plot::Plot p;
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p.set_viewport({0, 0, 800, 400});
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const u32 ax = p.add_x_axis({"t", {0.0, 100.0}, true, plot::AxisPlace::Bottom, false});
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plot::input::Controller c(p);
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c.set_viewport({0, 0, 800, 400});
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const f32 cursor_x = 200.0f;
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const f64 before = p.x_transform(ax).to_data_x(cursor_x);
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plot::input::WheelEvent w{cursor_x, 100.0f, 0.0f, 1.0f, 0};
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c.on_wheel(w);
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const f64 after = p.x_transform(ax).to_data_x(cursor_x);
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PLOT_CHECK_NEAR(before, after, 1e-6);
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PLOT_CHECK(plot::Range{p.x_range(ax)}.span() < 100.0); // zoomed in
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}
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PLOT_TEST(left_drag_pans_without_changing_span) {
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plot::Plot p;
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p.set_viewport({0, 0, 800, 400});
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const u32 ax = p.add_x_axis({"t", {0.0, 100.0}, true, plot::AxisPlace::Bottom, false});
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const u32 ay = p.add_y_axis({"v", {-1.0, 1.0}, true, plot::AxisPlace::Left, false});
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plot::input::Controller c(p);
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c.set_viewport({0, 0, 800, 400});
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const double span_before = p.x_range(ax).span();
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c.on_pointer({100, 100, 0, 0, plot::input::Button::Left, 0, true, true, false});
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PLOT_CHECK(c.drag_mode() == plot::input::DragMode::Pan);
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c.on_pointer({180, 130, 80, 30, plot::input::Button::Left, 0, true, false, false});
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c.on_pointer({180, 130, 0, 0, plot::input::Button::Left, 0, false, false, true});
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PLOT_CHECK(c.drag_mode() == plot::input::DragMode::None);
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PLOT_CHECK_NEAR(p.x_range(ax).span(), span_before, 1e-9); // span unchanged
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// 80 px right-drag on an 800 px plot showing [0, 100] reveals 10 units of
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// earlier data: the data follows the cursor. (The brief printed +10.0 here.)
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PLOT_CHECK_NEAR(p.x_range(ax).min, -10.0, 1e-6);
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PLOT_CHECK(p.y_range(ay).max > 1.0); // moving down raises y range
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}
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PLOT_TEST(shift_drag_box_zooms_to_selection) {
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plot::Plot p;
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p.set_viewport({0, 0, 800, 400});
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const u32 ax = p.add_x_axis({"t", {0.0, 800.0}, true, plot::AxisPlace::Bottom, false});
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plot::input::Controller c(p);
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c.set_viewport({0, 0, 800, 400});
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const u32 e_shift = 1u << 0; // Mod::Shift
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c.on_pointer({100, 50, 0, 0, plot::input::Button::Left, e_shift, true, true, false});
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PLOT_CHECK(c.drag_mode() == plot::input::DragMode::BoxZoom);
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c.on_pointer({300, 150, 200, 100, plot::input::Button::Left, e_shift, true, false, false});
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PLOT_CHECK_NEAR(c.selection_rect().x, 100.0, 1e-6);
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PLOT_CHECK_NEAR(c.selection_rect().w, 200.0, 1e-6);
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c.on_pointer({300, 150, 0, 0, plot::input::Button::Left, e_shift, false, false, true});
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PLOT_CHECK_NEAR(p.x_range(ax).min, 100.0, 1e-6);
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PLOT_CHECK_NEAR(p.x_range(ax).max, 300.0, 1e-6);
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}
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PLOT_TEST(auto_scale_disabled_by_user_interaction) {
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// A wheel zoom or pan MUST clear auto_scale on the affected axis so the range
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// the user chose is not snapped back by the next autoscale.
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plot::Plot p;
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p.set_viewport({0, 0, 800, 400});
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const u32 ax = p.add_x_axis({"t", {0.0, 100.0}, true, plot::AxisPlace::Bottom, false});
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plot::input::Controller c(p);
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c.set_viewport({0, 0, 800, 400});
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c.on_wheel({400.0f, 200.0f, 0.0f, 1.0f, 0});
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PLOT_CHECK(!p.x_axis(ax).auto_scale);
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}
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// --- resolutions of the brief's ambiguity, pinned ------------------------
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PLOT_TEST(box_zoom_below_threshold_is_a_click) {
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plot::Plot p;
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p.set_viewport({0, 0, 800, 400});
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const u32 ax = p.add_x_axis({"t", {0.0, 800.0}, false, plot::AxisPlace::Bottom, false});
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plot::input::Controller c(p);
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c.set_viewport({0, 0, 800, 400});
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c.on_pointer({100, 50, 0, 0, plot::input::Button::Left, kShift, true, true, false});
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c.on_pointer({102, 52, 2, 2, plot::input::Button::Left, kShift, true, false, false});
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c.on_pointer({102, 52, 0, 0, plot::input::Button::Left, kShift, false, false, true});
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PLOT_CHECK(c.drag_mode() == plot::input::DragMode::None);
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PLOT_CHECK_NEAR(p.x_range(ax).min, 0.0, 1e-9);
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PLOT_CHECK_NEAR(p.x_range(ax).max, 800.0, 1e-9);
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}
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PLOT_TEST(shift_wheel_zooms_x_only) {
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Fixture f;
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f.ay = f.plot.add_y_axis({"v", {-1.0, 1.0}, false, plot::AxisPlace::Left, false});
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f.controller.on_wheel({400.0f, 200.0f, 0.0f, 1.0f, kShift});
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PLOT_CHECK(f.plot.x_range(f.ax).span() < 100.0);
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PLOT_CHECK_NEAR(f.plot.y_range(f.ay).span(), 2.0, 1e-9);
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}
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PLOT_TEST(ctrl_wheel_zooms_y_only) {
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Fixture f;
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f.ay = f.plot.add_y_axis({"v", {-1.0, 1.0}, false, plot::AxisPlace::Left, false});
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f.controller.on_wheel({400.0f, 200.0f, 0.0f, 1.0f, kCtrl});
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PLOT_CHECK_NEAR(f.plot.x_range(f.ax).span(), 100.0, 1e-9);
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PLOT_CHECK(f.plot.y_range(f.ay).span() < 2.0);
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}
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PLOT_TEST(hovered_cursor_only_inside_plot_area) {
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plot::Plot p;
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p.set_viewport({0, 0, 800, 400});
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const u32 ax = p.add_x_axis({"t", {0.0, 100.0}, false, plot::AxisPlace::Bottom, false});
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const u32 cid = p.add_cursor(50.0, plot::Color::hex(0xFF0000));
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plot::input::Controller c(p);
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c.set_viewport({0, 0, 800, 400});
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const f32 sx = screen_x_of(p, ax, 50.0);
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c.on_pointer({sx, 200, 0, 0, plot::input::Button::Left, 0, false, false, false});
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PLOT_CHECK(c.hovered_cursor() == cid);
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// The left label strip is outside the plot area.
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c.on_pointer({10, 200, 0, 0, plot::input::Button::Left, 0, false, false, false});
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PLOT_CHECK(c.hovered_cursor() == plot::kInvalid);
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c.on_pointer({sx, 200, 0, 0, plot::input::Button::Left, 0, false, false, false});
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PLOT_CHECK(c.hovered_cursor() == cid);
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}
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PLOT_TEST(ctrl_drag_moves_the_nearest_cursor) {
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plot::Plot p;
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p.set_viewport({0, 0, 800, 400});
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const u32 ax = p.add_x_axis({"t", {0.0, 100.0}, false, plot::AxisPlace::Bottom, false});
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const u32 cid = p.add_cursor(20.0, plot::Color::hex(0xFF0000));
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plot::input::Controller c(p);
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c.set_viewport({0, 0, 800, 400});
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const f32 sx = screen_x_of(p, ax, 20.0);
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c.on_pointer({sx, 200, 0, 0, plot::input::Button::Left, kCtrl, true, true, false});
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PLOT_CHECK(c.drag_mode() == plot::input::DragMode::MoveCursor);
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c.on_pointer({sx + 100, 200, 100, 0, plot::input::Button::Left, kCtrl, true, false, false});
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c.on_pointer({sx + 100, 200, 0, 0, plot::input::Button::Left, kCtrl, false, false, true});
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PLOT_CHECK(c.drag_mode() == plot::input::DragMode::None);
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PLOT_CHECK(p.cursor(cid).x > 20.0);
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PLOT_CHECK_NEAR(p.cursor(cid).x, p.x_transform(ax).to_data_x(sx + 100), 1e-9);
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}
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PLOT_TEST(middle_drag_on_x_strip_zooms_x_only) {
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Fixture f;
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f.ay = f.plot.add_y_axis({"v", {-1.0, 1.0}, true, plot::AxisPlace::Left, false});
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const plot::PlotLayout& l = f.plot.layout();
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const f32 strip_x = l.axes.x + 0.5f * l.axes.w;
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const f32 strip_y = l.x_label_area.y + 0.5f * l.x_label_area.h;
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f.controller.on_pointer({strip_x, strip_y, 0, 0, plot::input::Button::Middle, 0, true, true, false});
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PLOT_CHECK(f.controller.drag_mode() == plot::input::DragMode::AxisZoomX);
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// Same sign convention as the wheel: a positive dy zooms in.
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f.controller.on_pointer({strip_x, strip_y + 20, 0, 20, plot::input::Button::Middle, 0, true, false, false});
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f.controller.on_pointer({strip_x, strip_y + 20, 0, 0, plot::input::Button::Middle, 0, false, false, true});
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PLOT_CHECK(f.plot.x_range(f.ax).span() < 100.0);
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PLOT_CHECK_NEAR(f.plot.y_range(f.ay).span(), 2.0, 1e-9);
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PLOT_CHECK(!f.plot.x_axis(f.ax).auto_scale);
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PLOT_CHECK(f.plot.y_axis(f.ay).auto_scale); // the untouched y axis keeps auto scale
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}
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PLOT_TEST(middle_drag_on_y_strip_zooms_y_only) {
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Fixture f;
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f.ay = f.plot.add_y_axis({"v", {-1.0, 1.0}, false, plot::AxisPlace::Left, false});
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const plot::PlotLayout& l = f.plot.layout();
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const f32 strip_x = l.y_label_area.x + 0.5f * l.y_label_area.w;
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const f32 strip_y = l.axes.y + 0.5f * l.axes.h;
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f.controller.on_pointer({strip_x, strip_y, 0, 0, plot::input::Button::Middle, 0, true, true, false});
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PLOT_CHECK(f.controller.drag_mode() == plot::input::DragMode::AxisZoomY);
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f.controller.on_pointer({strip_x, strip_y + 20, 0, 20, plot::input::Button::Middle, 0, true, false, false});
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f.controller.on_pointer({strip_x, strip_y + 20, 0, 0, plot::input::Button::Middle, 0, false, false, true});
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PLOT_CHECK_NEAR(f.plot.x_range(f.ax).span(), 100.0, 1e-9);
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PLOT_CHECK(f.plot.y_range(f.ay).span() < 2.0);
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}
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PLOT_TEST(key_plus_zooms_in_about_the_centre) {
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Fixture f;
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const f64 mid_before = 0.5 * (f.plot.x_range(f.ax).min + f.plot.x_range(f.ax).max);
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f.controller.on_key({plot::input::kKeyZoomIn, 0, true});
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PLOT_CHECK(f.plot.x_range(f.ax).span() < 100.0);
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PLOT_CHECK_NEAR(0.5 * (f.plot.x_range(f.ax).min + f.plot.x_range(f.ax).max), mid_before, 1e-9);
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const f64 span_after = f.plot.x_range(f.ax).span();
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f.controller.on_key({plot::input::kKeyZoomIn, 0, false}); // key-up is ignored
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PLOT_CHECK_NEAR(f.plot.x_range(f.ax).span(), span_after, 1e-12);
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}
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PLOT_TEST(key_minus_zooms_out) {
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Fixture f;
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f.controller.on_key({plot::input::kKeyZoomOut, 0, true});
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PLOT_CHECK(f.plot.x_range(f.ax).span() > 100.0);
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}
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PLOT_TEST(key_f_auto_fits_traces) {
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plot::Plot p;
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p.set_viewport({0, 0, 800, 400});
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const u32 ax = p.add_x_axis({"t", {0.0, 100.0}, false, plot::AxisPlace::Bottom, false});
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const u32 ay = p.add_y_axis({"v", {-1.0, 1.0}, false, plot::AxisPlace::Left, false});
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std::vector<f32> ys(51);
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for (u64 i = 0; i < ys.size(); ++i) ys[i] = static_cast<f32>(i) * 0.1f; // 0.0 .. 5.0
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plot::data::ArraySeries s(std::move(ys), 0.0, 1.0); // x = 0 .. 50
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p.add_trace({&s, plot::Color::hex(0x4FA3FF), 1.5f, 0, 0});
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plot::input::Controller c(p);
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c.set_viewport({0, 0, 800, 400});
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c.on_key({plot::input::kKeyFit, 0, true});
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PLOT_CHECK(p.x_range(ax).min < 0.0);
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PLOT_CHECK(p.x_range(ax).max < 100.0); // fitted to the series' 0..50
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PLOT_CHECK(p.y_range(ay).min < 0.0);
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PLOT_CHECK(p.y_range(ay).max > 1.0); // fitted to the series' 0..5
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PLOT_CHECK(p.x_axis(ax).auto_scale); // a fit re-arms auto scale
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PLOT_CHECK(p.y_axis(ay).auto_scale);
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}
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